COMPRESSIVE STRENGTH
Compressive Strength, is the force necessary to produce a 25% (or any givenpercentage) compression over the entire top area of the foam specimen.
Calculation:
Calculate the 25% compression deflection force, per unit area of
specimen, expresssed as kilopascals (or poundforce per square inch),
as follows:
CD = F / A
where:
CD = compression deflection force per unit of specimen area, kPa (psi).
F = force required to compress the specimen 25% of the thickness as measured. N (lbf).
A = specimen compression contast surface area, m^2 (in^2).
